great tutorial! that's exactly how I do the math and prepare my binding too! except I do iron it in half lengthwise before I roll it up into a coil :) you're tutorials are always so fantastic because they are clearly written and full of pictures! thanks!

I have made a couple quilts, about 30 or so, and I was under the impression that binding should be on the bias. Does you binding wear faster than on the bias, or is is just a pain-in-the-butt thing I've been doing for no real reason???